everything in the scenes are too dark, in comparsion to the snow.

use detailmaps, but don't overuse them, which could destroy the feeling there is now.

also if you use DEM's for terrains, please also use more realistic skins for models that have to be done in higher polycount and more life-like, otherwise make the terrains yourself.

Everything. EVERYTHING must be one in a game. Now it looks like you took a shot and placed your first model to the foreground...


Just some of my two cents, keep the work up, use more and more time on this and keep the project running!